TDA7850 4-Channel Car Amplifier Board DC 12V + BA3121

$26.67 USD $33.45 USD

TDA7850 4-Channel Digital Amplifier Board with BA3121 Noise Reduction

Upgrade your car audio system with this high-performance TDA7850 4-Channel Digital Amplifier Board. Engineered for audiophiles and DIY enthusiasts alike, this compact board delivers crisp, clear, Hi-Fi sound quality through its premium TDA7850 chip paired with the BA3121 noise isolation circuit — eliminating unwanted interference so your music comes through pure and undistorted.

Whether you're refreshing your vehicle's factory sound system or building a custom 4-channel amplifier from scratch, this versatile board offers the power, flexibility, and audio clarity to take your listening experience to the next level.

Key Features

Hi-Fi Grade TDA7850 Chip: A premium car stereo power amplifier IC that ensures rich, detailed audio reproduction across all four channels.
BA3121 Noise Reduction: Integrated noise isolation and elimination circuitry keeps your audio signal clean, clear, and free from electrical interference.
10,000µF Main Filter Capacitor: Provides ample energy storage to support dynamic audio peaks and unlock the full sound potential of the amplifier module.
High-Quality Coupling Capacitors & LC Filters: Deliver pure, stable power while minimizing distortion and signal interference for a premium listening experience.
4 Inputs / 4 Outputs: Connect multiple devices and speakers simultaneously with flexible multi-channel I/O options.
Dual Power Compatibility: Operates on a standard DC 12V power supply or directly from a 12V car power source — perfect for in-vehicle and bench use.
DIY Friendly: Ideal for custom car audio builds, amplifier upgrades, and electronics hobbyist projects.

Specifications

Model: TDA7850 with BA3121
Channels: 4
Input Voltage: DC 12V
Main Filter Capacitor: 10,000µF
Color: Red
Material: Plastic
Country of Origin: Made in Mainland China

Package Contents

1 × TDA7850 4-Channel Digital Amplifier Board

Note: Due to lighting conditions and display differences, the actual color may vary slightly from product images. Measurement tolerance is ±1–3 cm.

Frequently Asked Questions

Q: What vehicles or setups is the TDA7850 4-Channel Amplifier Board compatible with?

A: This amplifier board is compatible with any standard 12V car audio system and can also be used with a DC 12V bench power supply for DIY home audio builds. It works with most aftermarket and OEM head units that offer RCA or line-level outputs.

Q: How does the BA3121 noise reduction circuit improve audio quality?

A: The BA3121 chip actively isolates and eliminates electrical noise and ground loop interference from the audio signal path. This ensures that the sound delivered to your speakers is clean, clear, and free from hum or static — especially important in a vehicle's electrically noisy environment.

Q: Can I use this board for a DIY home amplifier project?

A: Yes! As long as you provide a stable DC 12V power supply, this board functions excellently in DIY 4-channel amplifier builds outside of a vehicle. Its compact design and multi-channel I/O make it a great choice for custom audio projects.

Q: What is included in the package?

A: The package includes 1 × TDA7850 4-Channel Digital Amplifier Board. No additional accessories, power supplies, or cables are included.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.